/// <summary>
/// Verifies whether the table exist implementation.
/// </summary>
/// <param name="tableName">The table name.</param>
/// <param name="setResult">The set result.</param>
/// <returns>A sequence of tasks to do the operation.</returns>
private TaskSequence DoesTableExistImpl(string tableName, Action <bool> setResult)
{
CommonUtils.CheckStringParameter(tableName, false, "tableName", Protocol.Constants.TableServiceMaxStringPropertySizeInChars);
TableServiceUtilities.CheckTableName(tableName, "tableName");
var svc = this.GetDataServiceContext();
var tableExistsQuery = (from table in svc.CreateQuery <TableServiceTable>(Protocol.Constants.TableServiceTablesName)
where table.TableName == tableName
select table).AsTableServiceQuery();
ResultSegment <TableServiceTable> segment = null;
while (true)
{
Task <ResultSegment <TableServiceTable> > tableExistsSegmentTask;
if (segment == null)
{
tableExistsSegmentTask = TaskImplHelper.GetRetryableAsyncTask <ResultSegment <TableServiceTable> >(
(setResultInner) => tableExistsQuery.ExecuteSegmentedImpl(null, setResultInner), RetryPolicy);
}
else
{
tableExistsSegmentTask = TaskImplHelper.GetRetryableAsyncTask <ResultSegment <TableServiceTable> >(segment.GetNextImpl, RetryPolicy);
}
yield return(tableExistsSegmentTask);
if (GetResultOrDefault(tableExistsSegmentTask, out segment))
{
if (segment.Results.Any())
{
setResult(true);
break;
}
else
{
setResult(false);
break;
}
}
else
{
setResult(false);
break;
}
}
}
/// <summary>
/// Lists the queues impl core.
/// </summary>
/// <param name="prefix">The prefix.</param>
/// <param name="detailsIncluded">The details included.</param>
/// <param name="continuationToken">The continuation token.</param>
/// <param name="pagination">The pagination.</param>
/// <param name="setResult">The set result.</param>
/// <returns>A <see cref="TaskSequence"/> for listing the queues.</returns>
private TaskSequence ListQueuesImplCore(
string prefix,
QueueListingDetails detailsIncluded,
ResultContinuation continuationToken,
ResultPagination pagination,
Action <ResultSegment <CloudQueue> > setResult)
{
CommonUtils.AssertContinuationType(continuationToken, ResultContinuation.ContinuationType.Queue);
ListingContext listingContext = new ListingContext(prefix, pagination.GetNextRequestPageSize())
{
Marker = continuationToken != null ? continuationToken.NextMarker : null
};
var queueList = new List <CloudQueue>();
var webRequest = QueueRequest.List(this.BaseUri, this.Timeout.RoundUpToSeconds(), listingContext, detailsIncluded);
this.Credentials.SignRequest(webRequest);
var listTask = webRequest.GetResponseAsyncWithTimeout(this, this.Timeout);
yield return(listTask);
string nextMarker;
using (var response = listTask.Result as HttpWebResponse)
{
var parsedResponse = QueueResponse.List(response);
// Materialize the results so that we can close the response
queueList.AddRange(parsedResponse.Queues.Select((Func <QueueEntry, CloudQueue>) this.SelectResponse));
nextMarker = parsedResponse.NextMarker;
}
ResultContinuation newContinuationToken = new ResultContinuation()
{
NextMarker = nextMarker, Type = ResultContinuation.ContinuationType.Queue
};
ResultSegment.CreateResultSegment(
setResult,
queueList,
newContinuationToken,
pagination,
this.RetryPolicy,
(paginationArg, continuationArg, resultSegment) =>
this.ListQueuesImplCore(prefix, detailsIncluded, continuationArg, paginationArg, resultSegment));
}
/// <summary>
/// Executes the segmented impl.
/// </summary>
/// <param name="continuationToken">The continuation token.</param>
/// <param name="setResult">The set result.</param>
/// <returns>A <see cref="TaskSequence"/> that executes the query and returns the first segment of results.</returns>
internal TaskSequence ExecuteSegmentedImpl(ResultContinuation continuationToken, Action <ResultSegment <TElement> > setResult)
{
var localQuery = this.query;
localQuery = RewriteQueryForTakeCount(localQuery, this.pagination);
localQuery = ApplyContinuationToQuery(continuationToken, localQuery);
var requestTask = localQuery.ExecuteAsync();
yield return(requestTask);
try
{
var responseResult = requestTask.Result;
var response = responseResult as QueryOperationResponse;
ResultContinuation newContinuationToken = this.GetTableContinuationFromResponse(response);
List <TElement> listResult = new List <TElement>(responseResult.ToList());
ResultSegment.CreateResultSegment <TElement>(
setResult,
listResult,
newContinuationToken,
this.pagination,
this.RetryPolicy,
(scratch, continuationArg, setResultInnerArg) => this.ExecuteSegmentedImpl(continuationArg, setResultInnerArg));
}
catch (InvalidOperationException ex)
{
var dsce = CommonUtils.FindInnerDataServiceClientException(ex);
if (dsce == null)
{
throw;
}
if ((HttpStatusCode)dsce.StatusCode == HttpStatusCode.NotFound)
{
setResult(new ResultSegment <TElement>(new List <TElement>(), false, null, null));
}
throw;
}
}
